Brake booster

Abstract

A brake booster with a master cylinder (10) comprises: a primary piston (12) and a secondary piston (14), with the secondary piston (14) being limited in its axial movability by a stop pin (25) being accepted transversely to a longitudinal axis (L) of the master cylinder (10) in a hole (24), and a reservoir (16) for brake fluid, comprising a connection (17) via which the reservoir (16) is connected with the master cylinder (10), with the connection (17) being arranged in the radial extension of the stop pin (25), with the connection (17) comprising a transverse web (28) in its flow cross sectional area which covers the hole 24 at least partially.

I claim: 
     
       1. A brake booster comprising: a master cylinder (10) including a primary piston (12) and a secondary piston (14), with the secondary piston (14) being limited in its axial movability by a stop pin (25) which is accepted in a hole (24) extending transversely to a longitudinal axis (L) of the master cylinder,   a reservoir (16) for brake fluid, comprising a connection (17) via which the reservoir (16) is connected with the master cylinder (10), with the connection (17) being arranged in a radial extension of the stop pin (25), and   the connection (17) including a transverse web (28) spanning a cross sectional area thereof, whereby the transverse web (28) partially covers the hole (24) to prevent the stop pin (25) from moving from the hole (24).   
     
     
       2. A brake booster according to claim 1, characterized in that the connection (17) is installed in an opening (22) in the master cylinder (10), which is in alignment with the hole (24), and   the connection (17) is formed by a fitting (18) formed on the reservoir (16) and a seal (20).   
     
     
       3. A brake booster according to claim 2, characterized in that the transverse web (28) is formed in or at the fitting (18).   
     
     
       4. A brake booster according to claim 3, characterized in that the transverse web (28) is arranged in the area of the free end of the fitting (18).   
     
     
       5. A reservoir (16) for a brake booster comprising: a fitting (18) adapted to connect the reservoir (16) with a master cylinder (10), and defining a flow region therebetween,   the fitting (18) having a transverse web which spans a cross sectional area of the flow region, the transverse web adapted to permit fluid flow through the flow region and to prevent movement into the flow region of a stop pin (25) located in a hole (24) in the master cylinder (10), the hole (24) aligned with the flow region.   
     
     
       6. A brake booster according to claim 2, characterized in that a transverse web (20') is formed in or at the seal (20).   
     
     
       7. A seal (20) for a brake booster comprising a reservoir (16) with a fitting (18), the fitting (18) having a free end adapted to connect the reservoir (16) with the master cylinder (10), the seal (20) designed to surround the fitting (18), and the seal (20)   including a transverse web (28) which spans the free end of the fitting (18), the transverse web adapted to permit fluid flow between the reservoir (16) and the master cylinder (10) and to prevent movement into reservoir (16) of a stop pin (25) located in a hole (24) in the master cylinder (10) when the hole (24) is aligned with the fitting (18).